Gauge or leveling device for electric or other drills



April 14, 1925. 1,533,975

C. A. DENE GAUGE OR LEVELING DEVICE FOR ELECTRIC OR OTHER DRILLS.

Filed June 16 1923 IN VEN TOR CHAUPL E5 4 DE'NE ATTORNEYS Patented Apr. 14, 1925.

UNITED STATES PATENT orricE.

CHARLES ALBERT DENE, g ramnnarvirm, NEW JERSEY.

GAUGE OR LEVELING DEVICE FOR ELECTRIC OTHER DRILLS To ail whom it may concern Be it known that 1, CHARLES A. DENE, a citizen of-the United States, and a resident of Lambertville, in the county of Hunterdon and State of New Jersey, have invented a new and Improved Gauge or Leveling Device for Electric or Other Drills, of which' provide an attachment for drills by means of which holes may be drilled at predetermined angles and the drill maintained at such angle throughout the drilling operation. a It is a still further object of the invention to provide an attachment by means of which a plurality of single holes may be drilled uniformly at the same angle.

l/Vith the above and other objects in view, reference is had to the accompanying drawings, in which Figure 1 is a View in elevation of an electric drill constructed in accordance with the present invention; v Fig. 2 is a View in clevation'taken at right angles to Fig. 1;

Fig. 3 1s a detail sectional View; I Fig: 4 ma detail sectional view taken at right ,angles to Fig.3.

Referring more particularly to the drawings the reference character 5 designates a.

drill, and while the same is shown as a drill of the electric type, it is obvious that the invention may be applied to any typeof boring tool, andit is therefore not limited to electric drills. i v

The drill shown is formed witha housing 6, provided with lugs or bosses 7 on one of its side faces,'-and mounted on said'lugs or bosses 7 ma horizontal plane, is an arcuate scale 8. On the face right-angularly disposed with respect to the face upon which the bosses 7 are formed are bosses 9, which serve to support .an arcuate scale 10, which occupies avertical position with respect to the drill. I each of the aforementioned balance weight 21.

Application filed June 16, 1928. Serial No. 645,826.

cases the scales 8 and 10 are secured to their respective bossesby means of screws'or the like, 11.

, Adapted to .coact with the scale 8 isa pointer 12, andadapted to coact with the scale 10 is a pointer 13. This pointer 12 is mounted on astud 14, or the like, carried by the drill housing, and said stud has a forwardly extending sleeve 15, upon the end of which is mounted a nut16. The sleeve placement from the reduced portion, a pin 18 is employedri. The pointer 12 is provided with a projecting pin 19, the purpose of which will be hereinafter. described: Mounted upon the sleeve 15 of theipointer 12, is an arm 20, and said arnr is provided with a This arm 20 is provided with two openings 22'and' 23, either of which is adapted to receive the pin 19 of the point or 12, in order that the weighted arm -20-may be positioned either parallel with the pointer 12, as shown'in Fig. 1, or at right angles thereto, as shown in Fig.3. To'maintain the weighted arm 20 inlposition against the pointer 12, a spring 24- is mounted 0n,the

sleeve 15, which sleeve causes endwise ten sion between the nut 16 and the weighted,

arm 20. After this pointer and the weighted arm has been mounted on the reduced portion 17 of the stud 14, a guard plate25 The pointer 13 is mounted on the reduced end 28 of a stud 29 and the same is'retained in position upon said reduced end 28 by means of a'pin 30, or the like. This pointer 13 is provided with a weighted portion 31, whereby the-pointer is always aintained in a true vertical plane. After t e pointer 13 has been positioned, a guard plate 32 is positioned upon lugs 33 and retained thereon by means of screws 34, which guard plate 32 serves to protect the pointer 13 and its pivotal point 29.

The device operates ner:

When it is desired to drill a hole at right in the following manangles to the surface, the drill is positioned" in such a manner that the pointer 12 will coincide with the center of the'arcuate scale in this position, the hole when finished will 'occupy aplane at ri ht angles to the sur face of the material t was drilled.

If it is desired to drill a hole at a predetermined angle, the drill is ositioned so that the pointers will coinci e with the proper calibrations on their respective scales, and if the drill is maintained in this position' the hole will be drilled in the plane of such predetermined angle.

It is to be understood that in the previously described operation of the device, the weighted arm 20 occupiesa position parallel, with or in longitudinal alinement with the pointer- 12. When it is desired to use the drill in a horizontal plane, the weighted arm 20 is positioned at right angles to its rough which the hole pointer 12, and this is done by disengaging the openin 23 in the arm 20 with the pin 19 carried by the pointer 12, and engaging the opening 22 with the pin 19. With this weighted arm so adjusted with respect to its pointer 12 and the drill used in a horizontal plane, the weighted arm 20 will depend and a true horizontal position of the drill .may thus be had by properly positioning the pointer 12 with respect to its scale 8.

From the foregoing it is apparentythat the present invention provides a gauge fordrills by means of which the drill may be posi tioned and maintained in position at rightv and maintained in a position in the plane 35 of a predetermined angle with respect to the surface upon which the drill is operat- 1n p at is claimed is:

1. A level indicator, comprising a weighted arm, a pointer means for pivotally mounting said weighted arm and pointer, and means for rigidl connecting said pointer to said arm, sai means comprising a pin carried by the pointer adapted to be received in one of a plurality of openings formed in the weighted arm, and means for maintaining said pin in its opening.

2. A level indicator, comprising'a weighted arm, a pointer means for pivotally mount ing said Weighted arm and ointer, and means for rigidly connecting said pointer to 'saidarm, said means comprising a pin carried by the pointer adapted to be received in one of a plurality of openings formed in the weighted ,arm, and means for maintaining said pin in its opening, said means comprising a coil spring surrounding the pivotal point of the pivoted arm and hav'ingengagement therewith.

CHARLES ALBERT DENE, 

